CN104767374B - A kind of high-power signal emission control method based on DDS - Google Patents
A kind of high-power signal emission control method based on DDS Download PDFInfo
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- CN104767374B CN104767374B CN201510145205.3A CN201510145205A CN104767374B CN 104767374 B CN104767374 B CN 104767374B CN 201510145205 A CN201510145205 A CN 201510145205A CN 104767374 B CN104767374 B CN 104767374B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
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Abstract
It is low using DDS synthetic technologys, the synthesis of programme-control transmission signal, digital technology D class high frequency amplifying modules, signal distortion the invention discloses a kind of high-power signal emission control method based on DDS；PFC correcting technologies are designed, improve the power factor and emission effciency of high-power transmission signal；Module design occurs for staircase waveform, emission control intelligent mode, sine wave, staircase waveform switching efficiency are high, and effectively suppressor pulse spike disturbs for the rising edge and fall time software smart delays of high-power ladder square-wave signal, it is stable with very low frequencies, high-power emission function, frequency plot；The features such as spike interference of the high-power ladder square-wave signal on inductive load is small, and intelligent high-power emission effciency is high.
Description
Technical field
The present invention relates to oil well logging field, and in particular to a kind of high-power signal emission control method based on DDS.
Background technology
Formation resistivity logging is the logging method for being used to determine reservoir remaining oil saturation in oilfield development process after set,
Reservoir performance transport conditions are monitored, determine reservoir remaining oil oil saturation, optimize oil mining scheme.The hair of logger
Penetrate size of current and be directly connected to measurement accuracy and the dynamic range of reservoir resistivity measurement, influence to determine stratum oil-containing saturation
The accuracy of degree, improves the frequency of emission current signal and the size and precision of amplitude, and the difficulty mainly faced has：Due to steel bushing
The influence of pipe Kelvin effect, emission signal frequency scope is necessary for 0.1-10Hz, and is directed to these special Low Frequency Sine Signals,
Frequency stability is poor in emission process；Production logging uses seven core cable after set, and single resistance is 200 Ω or so, even in
It is used in combination, is launched under 9A current conditions using the core of Phantom Power 4, also needs to provide more than 4000W high-power signal on ground, so
Big power emission efficiency is difficult to improve；Spike shock pulse signal of the high-power staircase waveform in inductive load in transmitting is done
Disturbing greatly, influences the stability and reliability of instrument, is fully solved this without any product or design both at home and abroad at present
A little problems.
The content of the invention
It is an object of the invention to provide a kind of high-power signal emission control method based on DDS, solve to open in oil field
In hair well logging, spike shock pulse signal interference of the staircase waveform in inductive load is big in high-power signal transmitting, influences instrument
The problem of stability and reliability.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of high-power signal emission control method based on DDS, comprises the following steps：
(1), input ac voltage is after the suppression of EMC electromagnetic interferences, be sent into PFC power factor correction modules carry out power because
Element correction, correction complete after through DC-isolation power supply circuit carry out rectification, filtering, vibration, isolation, again rectification, filtering formed it is straight
Current switching power supply exports, and is D classes high frequency amplifying module, DSP central control units and the power supply of square wave inverting module；
(2) under the control for, entreating control unit in dsp, sine feedback and square-wave feedback two-way closed loop feedback control link,
The low-frequency high-power signal for scale and well logging transmitting is produced respectively；
Under the control for entreating control unit in dsp, DDS signal synthesizing modules produce DDS signal sources, then high by D classes
Frequency amplification module, that LPF output driving module forms high-power output is defeated to the first dpdt relay, LPF
Go out drive module to be connected with DSP central control units by sinusoidal feedback adjustment link；
At the same time, under the control for entreating control unit in dsp, the adjustable direct current of square wave inverting module output size
Source, electric current are connected through the positive and negative two-way switching output of square wave isolation and amplifier drive module timesharing with the second dpdt relay, with
The high-power electric current under downhole electrical motor and direct-current emission is provided, square wave isolation and amplifier drive module also passes through square-wave feedback adjustment ring
Section is connected with DSP central control units；
(3) under the control for, entreating control unit in dsp, Control drive module drives the first DPDT relay
Device, the second dpdt relay are respectively completed Phantom Power, there is provided well is powered and realized in the driving of underground hydraulic pressure direct current generator
The scale transmitting and well logging transmitting of lower instrument.
As present invention further optimization scheme, step (3) the Control drive module drives the first double-pole
Double-throw relay and the work of the second dpdt relay, K1, K2 normally closed interlock connection of the first dpdt relay are sinusoidal
High-power output respectively to the centre cap 5 of pattern Circuit Fault on Secondary Transformer tap 4,6 and the centre cap 8 of secondary side tap 7,9,
Complete downhole instrument scale emission function；K3, K4 normally open contact connection high-power output of square wave of second dpdt relay
To the centre cap 4 of underground communication power supply Circuit Fault on Secondary Transformer tap 3,5 and the crust of cable core 10, Phantom Power is realized,
The driving power supply of underground hydraulic pressure direct current generator is provided；K3, K4 normally closed interlock of second dpdt relay are used to turn off underground
Motor.
As present invention further optimization scheme, the digital water transfer sine wave by DSP control process units numeral just
String drive signal synthesis module is completed, and after the completion of the fitting of digitized sine wave drive signal, is produced through processing of circuit for driving D
The high-frequency signal of class high frequency amplifying module.
As present invention further optimization scheme, the D classes high frequency amplifying module is exported as 400V or so high positive pressure
String modulates pulse, using LC low pass filter output drivings, filters out required Low Frequency Sine Signals.
As present invention further optimization scheme, step (1) input AC 180V~250V voltages are through EMC electromagnetism
After AF panel, it is sent into PFC power factor correction modules and carries out Active PFC, transmission signal peak power is 4000W, work(
Power factor ＞ 95% after the completion of the correction of rate factor PFC rectification modules；After through 4000W DC-isolation power supply circuits, by whole
Stream, filtering, vibration, isolation, rectification, filtering form voltage again be 400V, the direct-current switch power supply output that rated current is 9A.
As present invention further optimization scheme, the DDS signal synthesizing modules produce DDS signal sources, its sine wave
The shape distortion factor≤3%, low-frequency signals frequency range pass through D classes high frequency amplifying module, LPF output is driven in 0.1-10Hz
Dynamic model block and sinusoidal feedback adjustment link, form the high-power output that reference frequency stability is ± 30ppm.
As present invention further optimization scheme, the rising edge of the high-power ladder square-wave signal and trailing edge when
Between meet in 5ms between 20ms, square-wave feedback adjustment link meets stability≤1% of out-put supply.
As present invention further optimization scheme, the D classes high frequency amplifying module uses the high-frequency drive of digit synthesis
Pulse, reference frequency 100MHz, carrier frequency are 20kHz~5031kHz；When output sinusoidal signal frequency changes, number
The points of sine wave of word fitting immobilize, and use 20kHz as carrier wave during 1Hz sine waves, use 50kHz during 10Hz sine waves
For carrier wave, the sine wave distortion factor of formation is fitted below 3%.
The present invention has advantages below compared with prior art：
1st, high-power transmission signal uses DDS synthetic technologys, the frequency of signal, amplitude stabilization, improves the essence of transmission signal
Degree.
2nd, PFC correcting technologies, the power factor of high-power signal, digital technology D class high frequency amplifying modules, signal are improved
The distortion factor is low.
3rd, module design occurs for square wave, launches the time of intelligent control rising edge and trailing edge, effectively suppresses spike and does
Disturb.
Brief description of the drawings
Accompanying drawing 1 is the high-power signal emission control method schematic diagram based on DDS.
Accompanying drawing 2 is DDS high-precision signals synthesis hardware architecture diagram.
Embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with accompanying drawing.
Accompanying drawing 1 is to be based on high-power emission control method schematic diagram, and the flow of control method is from top to bottom successively by PFC work(
Rate factor correction module 1,4000W DC-isolations power supply circuit 2, DDS signal synthesizing modules 3, DSP central control units 4, clock
And 232 interfaces 5, square wave inverting module 6, D classes high frequency amplifying module 7, sinusoidal feedback adjustment link 8, square-wave feedback adjustment link
9th, square wave isolation and amplifier drive module 10, LPF output driving module 11, Control drive module 12, the first double-pole
Double-throw relay 13, the second dpdt relay 14, pattern transformer 15, underground power supply used power transformer 16 etc. are formed.
The high-power emission control method of the present invention uses DDS synthetic technologys, the synthesis of programme-control transmission signal, benchmark letter
Number frequency stability reaches ± 30ppm.Digital technology D class high frequency amplifying modules, signal distortion are low；PFC correcting technologies are designed,
Improve the power factor and emission effciency of high-power transmission signal；Staircase waveform occurs module and designed, emission control intelligent mode,
Sine wave, staircase waveform switching efficiency are high, and the rising edge and fall time software smart delays of high-power ladder square-wave signal are effective
Ground suppressor pulse spike interference.The invention has independent technical scheme and technology path, efficiently solves problem above.
The flow of control method is from top to bottom successively by PFC power factor correction modules, 4000W DC-isolations power supply electricity
Road, DDS signal synthesizing modules, DSP central control units, clock and 232 interfaces, square wave inverting module, D class High frequency amplification moulds
Block, sinusoidal feedback adjustment link, square-wave feedback adjustment link, square wave isolation and amplifier drive module, LPF output driving mould
Block, Control drive module, dpdt relay, pattern transformer, underground power supply used power transformer etc. are formed.
Input AC 180V~250V voltages are sent into PFC power factor correction modules 1 and entered after the suppression of EMC electromagnetic interferences
Row Active PFC, power factor PFC circuit for rectifying, power factor ＞ 95% after the completion of correction；After through 4000W direct currents every
From power supply circuit 2, by rectification, filtering, vibration, isolation, rectification, filtering form voltage again be 400V, and rated current is 9A's
Direct-current switch power supply exports, there is provided the high-power power supply of square wave and sine wave.Under the control for entreating control unit 4 in dsp, two-way
Closed loop feedback control link, the low-frequency high-power signal output for scale and well logging transmitting is produced respectively.
DDS signal synthesizing modules 3 produce DDS signal sources, its sinusoidal waveform distortion factor≤3%, low-frequency signals frequency model
0.1-10Hz is trapped among, then, passes through D classes high frequency amplifying module 7, LPF output driving module 11 and sinusoidal feedback adjustment ring
Section 8, form the high-power output that reference frequency stability is ± 30ppm；At the same time, the control of control unit 4 is entreated in dsp
Under, the adjustable dc source of exportable size of square wave inverting module 6, to provide the high-power electricity under downhole electrical motor and direct-current emission
Stream.
D classes high frequency amplifying module uses the high-frequency drive pulse of digit synthesis, reference frequency 100MHz, and carrier frequency is
20kHz~5031kHz.When output sinusoidal signal frequency changes, the points of the sine wave of digital water transfer immobilize,
20kHz is used during 1Hz sine waves as carrier wave, 50kHz is used as carrier wave during 10Hz, is fitted the sine wave distortion factor of formation 3%
Below.Digital water transfer sine wave is completed by DSP control process unit numeral sinusoidal drive signals synthesis modules, digitized sine wave
After the completion of drive signal fitting, the high-frequency signal for driving D class high frequency amplifying modules is produced through processing of circuit.D class high frequencies are put
The high pressure Sine Modulated pulse that big module output is 400V or so.Using LC low pass filter output drivings, filter out required low
Frequency sinusoidal signal.
DDS signal synthesizing modules produce DDS signal sources, its sinusoidal waveform distortion factor≤3%, low-frequency signals frequency range
In 0.1-10Hz, then, pass through D classes high frequency amplifying module, LPF output driving module and sinusoidal feedback adjustment link, shape
Into the high-power output that reference frequency stability is ± 30ppm；At the same time, under the control for entreating control unit 4 in dsp, side
The adjustable dc source of ripple inverting module output size, and can the positive and negative two-way switching output of timesharing, to provide downhole electrical motor and straight
High-power electric current under stream transmitting.By the assemble software digital delay techniques of DSP central control units 4, high-power rank is set
The rising edge of terraced square-wave signal and the time of trailing edge meet effectively reduce rising edge and decline between 20ms in 5ms
The interference of the cable inductive load pulse spike on edge.Square-wave feedback adjustment link 9 meets stability≤1% of out-put supply, when
Clock and 232 interfaces 5 are the necessary external circuits of the normal work of DSP central control units 4.Control drive module 12 is used for
Drive the first dpdt relay 13 and the second dpdt relay 14, K1, K2 of the first dpdt relay 13 are normal
The sinusoidal high-power output of contact connection 4,6 centre caps 5 and 7,9 centre caps 8 to pattern transformer 15 respectively are closed, complete well
Lower instrument calibration emission function；When K1, K2 of the first dpdt relay 13 connect normally open contact, now the 1 of K1 and 2 connects
It is logical, ground plane loop electrode G, K2 1 and 2 connections, output cathode is connected to 4,6 centre caps 5 and 7,9 centre caps 8, it is real
The double Phantom Powers in parallel of existing quad core 2, core 6, core 3, core 5, the resistance of launching circuit are reduced to original a quarter
That is 50 Ω, underground logging emission function is completed；K3, K4 normally open contact connection square wave of second dpdt relay 14 are high-power
3,5 centre caps 4 and the crust of cable core 10 of underground communication power supply transformer 16 are output to, realize Phantom Power, there is provided well
The driving power supply of lower hydraulic pressure direct current generator.K3, K4 normally closed interlock of second dpdt relay 14 are used to turn off downhole electrical motor.
Control drive module 12 is that the function of complete design is controlled by DSP central control units 4.
Accompanying drawing 2 is DDS high-precision signals synthesis hardware architecture diagram.
DDS signal synthesizing modules 3 are by synchronizing clock signals 17, phase accumulator 20, phase amplitude converter 21, waveform
ROM 22 is stored, D/A converter 18, low pass filter 19, exports isolation buffers 23, dsp control signal 24, frequency control word
The grade of signal 25 forms.Under the synergy of dsp control signal 24, frequency control word signal 25 and synchronizing clock signals 17, carry
For the synchronizing signal of phase accumulator 20, set of frequency and serial data, the output of phase accumulator 20 is changed by phase amplitude
Device 21, there is provided the sampling sine discrete signal of out of phase, Waveform storage ROM 22 store conversion after discrete signal, sample from
Scattered signal is converted into analog quantity, then low-pass filtered device after D/A converter 18, the sine wave discrete digital amount of synthesis
19, isolation buffers 23 are exported, obtain required DDS analog output signals.Direct digital synthesis technique series of data stream
An analog signal set in advance is produced by digital analog converter.Frequency conversion speed and the frequency for realizing signal are accurate
Unification between degree.Analog output signal has the characteristics that phse conversion is continuous, frequency stabilization.
Claims (5)
1. a kind of high-power signal emission control method based on DDS, it is characterised in that comprise the following steps：
(1), input ac voltage through EMC electromagnetic interferences suppression after, be sent into PFC power factor correction modules (1) carry out power because
Element correction, correction complete after through DC-isolation power supply circuit carry out rectification, filtering, vibration, isolation, again rectification, filtering formed it is straight
Current switching power supply exports, and is D classes high frequency amplifying module (7), DSP central control units (4) and square wave inverting module (6) power supply；
(2) under the control for, entreating control unit (4) in dsp, sine feedback and square-wave feedback two-way closed loop feedback control link,
The low-frequency high-power signal for scale and well logging transmitting is produced respectively；
Under the control for entreating control unit (4) in dsp, DDS signal synthesizing modules (3) produce DDS signal sources, then pass through D classes
High frequency amplifying module (7), LPF output driving module (11) form high-power output to the first dpdt relay
(13), LPF output driving module (11) is connected by sinusoidal feedback adjustment link (8) with DSP central control units (4)；
At the same time, under the control for entreating control unit (4) in dsp, the adjustable direct current of square wave inverting module (6) output size
Source, electric current is through the positive and negative two-way switching output of square wave isolation and amplifier drive module (10) timesharing and the second dpdt relay (14)
Connection, to provide the high-power electric current under downhole electrical motor and direct-current emission, square wave isolation and amplifier drive module (10) the also side of passing through
Ripple feedback adjustment link (9) is connected with DSP central control units (4)；
(3), in dsp entreat control unit (4) control under, Control drive module (12) drive the first DPDT after
Electrical equipment (13), the second dpdt relay (14) are respectively completed Phantom Power, there is provided the driving of underground hydraulic pressure direct current generator supplies
Electricity and the scale transmitting and well logging transmitting for realizing downhole instrument；
Step (3) the Control drive module (12) drives the first dpdt relay (13) and the second DPDT
Relay (14) works, and K1, K2 normally closed interlock of the first dpdt relay (13) connect sinusoidal high-power output respectively extremely
The centre cap 5 of pattern transformer (15) secondary side tap 4,6 and the centre cap 8 of secondary side tap 7,9, complete downhole instrument
Scale emission function；K3, K4 normally open contact connection square wave of second dpdt relay (14) are high-power to be output to underground friendship
The centre cap 4 of power supply transformer (16) secondary side tap 3,5 and the crust of cable core 10 are flowed, realizes Phantom Power, there is provided
The driving power supply of underground hydraulic pressure direct current generator；K3, K4 normally closed interlock of second dpdt relay (14) are used to turn off underground
Motor.
2. the high-power signal emission control method according to claim 1 based on DDS, it is characterised in that：The D classes are high
Frequency amplification module (7) output is 400V or so high pressure Sine Modulated pulse, using LC low pass filter output drivings, filters out institute
The Low Frequency Sine Signals needed.
3. the high-power signal emission control method according to claim 1 based on DDS, it is characterised in that：The step
(1) input AC 180V~250V voltages are sent into PFC power factor correction modules (1) and carry out work(after the suppression of EMC electromagnetic interferences
Rate factor correction, transmission signal peak power are 4000W, power factor ＞ after the completion of the correction of power factor PFC rectification modules
95%；After through 4000W DC-isolation power supply circuits, by rectification, filtering, vibration, isolation, rectification, filtering form voltage again
For 400V, the direct-current switch power supply that rated current is 9A exports.
4. the high-power signal emission control method according to claim 1 based on DDS, it is characterised in that：The DDS letters
Number synthesis module (3) produces DDS signal sources, and its sinusoidal waveform distortion factor≤3%, low-frequency signals frequency range is in 0.1-
10Hz, by D classes high frequency amplifying module (7), LPF output driving module and sinusoidal feedback adjustment link, form benchmark frequency
Rate stability is ± 30ppm high-power output.
5. the high-power signal emission control method according to claim 1 based on DDS, it is characterised in that：The D classes are high
Frequency amplification module (7) use digit synthesis high-frequency drive pulse, reference frequency 100MHz, carrier frequency be 20kHz~
5031kHz；When output sinusoidal signal frequency changes, the points of the sine wave of digital water transfer immobilize, 1Hz sine waves
Shi Caiyong 20kHz are carrier wave, use 50kHz as carrier wave during 10Hz sine waves, be fitted the sine wave distortion factor of formation 3% with
Under.
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| CN106873712B (en) * | 2017-02-14 | 2021-03-02 | 北京北方华创微电子装备有限公司 | Radio frequency generator control circuit and radio frequency generator |
| CN107145186B (en) * | 2017-04-05 | 2019-04-05 | 电子科技大学 | A kind of controllable mode signal source of borehole radar step frequency |
| CN107742988B (en) * | 2017-10-19 | 2020-04-21 | 绵阳市维博电子有限责任公司 | Sine wave power supply capable of meeting frequent on-off of inductive load and method thereof |
| CN111969961B (en) * | 2020-10-22 | 2021-03-02 | 深圳市南方硅谷半导体有限公司 | Amplifier with feedback structure |
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| CN101900778A (en) * | 2009-06-01 | 2010-12-01 | 北京七六一通信雷达有限公司 | Fault self-diagnosis method of matching network and device thereof |
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|---|---|---|---|---|
| CN101900778A (en) * | 2009-06-01 | 2010-12-01 | 北京七六一通信雷达有限公司 | Fault self-diagnosis method of matching network and device thereof |
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| Title |
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| TCFR型过套管电阻率测井仪研制;包德洲等;《测井技术》;20130630;第37卷(第3期);第314-321页 * |
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